QHY9701 is a cooled scientific CMOS camera with GSENSE9701 back illuminated scientific-level CMOS sensor. The CMOS has a very wide spectral response.
With the characteristics of large pixels, ultra-wide spectrum and low noise, it is suitable for high-end microscopy, micro-optics, biofluorescence and other scientific research fields. It has 89% peak QE at 610nm. The high, wide response from NIR to UV makes the QHY9701 a perfect camera for spectrum analysis and spectrum imaging systems.
The QHY9701 is also an ideal scientific CMOS camera for Fluorescence imaging .
BSI, back-illuminated CMOS structure:
One benefit of the back-illuminated CMOS structure is improved sensitivity. In a typical front-illuminated sensor, photons from the target entering the photosensitive layer of the sensor must first pass through the metal wiring that is embedded just above the photosensitive layer. The wiring structure reflects some of the photons and reduces the efficiency of the sensor.
In the back- illuminated sensor the light is allowed to enter the photosensitive surface from the reverse side. In this case the sensor’s embedded wiring structure is below the photosensitive layer. As a result, more incoming photons strike the photosensitive layer and more electrons are generated and captured in the pixel well. This ratio of photon to electron production is called quantum efficiency. The higher the quantum efficiency the more efficient the sensor is at converting photons to electrons and hence the more sensitive the sensor is to capturing an image of something dim.
